Aqueous dispersion of fluoralkylated polymer particles with acorn morphology
a technology acorns, applied in the field of aqueous dispersion of fluoroalkylated polymer particles with acorn morphology, can solve the problem that fluoroalkylated latexes are the significant cost premium relative to their hydrocarbon counterparts
Active Publication Date: 2018-12-06
ROHM & HAAS CO
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- Abstract
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AI Technical Summary
Benefits of technology
The present invention provides a new composition that includes polymer particles with a unique structure. The particles have a core that protrudes from a shell. The core is made up of a fluoroalkylated monomer and the shell is made up of a phosphorus acid monomer or itaconic acid. The ratio of shell to core is important and affects the function of the particles. This invention offers a way to selectively concentrate fluoroalkyl functionality into polymer particles with acorn morphology.
Problems solved by technology
One of the primary drawbacks to using fluoroalkylated latexes is the significant cost premium relative to their hydrocarbon counterparts.
Method used
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example 1
ispersion of Acorn Polymer Particles with Fluoroalkylated Core
A. Core (Preform) Synthesis
[0021]A first monomer emulsion was prepared by mixing deionized water (200 g), Disponil FES 993 surfactant (64 g, 30% active), butyl acrylate (203.2 g), styrene (203.2 g), 2,2,2,-trifluoroethyl methacrylate (192 g), allyl methacrylate (9.6 g), sodium 4-vinylbenzenesulfonate (17.78 g, 90% active), and methacrylic acid (16 g).
[0022]To a 5-L, four necked round bottom flask equipped with a paddle stirrer, a thermometer, nitrogen inlet, and a reflux condenser was added deionized water (600 g) and Disponil FES 32 surfactant (21.3 g, 30% active). The contents of the flask were heated to 85° C. under N2 and stirring was initiated. A portion of the first monomer emulsion (70 g) was then added, quickly followed by a solution of ammonium persulfate (2.56 g) dissolved in deionized water (30 g) followed by a rinse of deionized water (5 g). After stirring for 10 min, the remainder of the first monomer emulsio...
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Abstract
The present invention provides a composition comprising 1) an aqueous dispersion of polymer particles having a core-shell morphology wherein the core protuberates from the shell; wherein the core comprises from 5 to 90 weight percent structural units of a fluoroalkylated monomer, and 2) less than 0.09 weight percent structural units of a phosphorus acid monomer; and wherein the shell comprises from 0.1 to 5 weight percent of itaconic acid or a phosphorus acid monomer, based on the weight of the shell. The present invention addresses a need in the art by providing a way of selectively concentrating fluoroalkyl functionality into polymer particles with acorn morphology, thereby providing an improvement in dirt pick-up resistance of the subsequent coating.
Description
BACKGROUND OF THE INVENTION[0001]The present invention relates to an aqueous dispersion of fluoroalkylated polymer particles with acorn morphology.[0002]Aqueous dispersions of polymer particles functionalized with fluoroalkyl groups (fluoroalkylated latexes) are used in coatings formulations due to their differentiated performance relative to traditional non-fluorinated hydrocarbon-based polymers. The inclusion of fluorinated functionality is often desirable in coatings applications where soil resistance, stain resistance, durability, and / or weatherability are sought after performance properties. One of the primary drawbacks to using fluoroalkylated latexes is the significant cost premium relative to their hydrocarbon counterparts. Accordingly, it would be an advantage in the field of coatings to find a polymer capable of delivering improved stain resistance more efficiently.SUMMARY OF THE INVENTION[0003]The present invention addresses a need in the art by providing a composition co...
Claims
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IPC IPC(8): C08J3/05C08L33/14C08F30/02
CPCC08J3/05C08L33/14C08F30/02C08J2333/16C08L2207/53C08L25/18C08F2800/20C08L27/12C08L33/08C08L2666/42C08L2666/70C08F220/1804C08F212/08C08F257/02C08F265/06C09D151/003C08F220/14C08F230/02C08F220/24C08F220/40C08F220/06C08F228/02B82Y30/00C08F12/30C09D133/08C08K2003/2241C08F2/22C09D143/02C08F212/30C08J3/126C08L33/16C08L43/02C08L25/14C08L33/12C09D133/16C08F214/285C08F130/02C08F114/28C08F14/18C08F214/28C08F214/186C08F114/18C08F214/18C08F14/28
Inventor BOHLING, JAMES C.BROWNELL, ARNOLD S.SWARTZ, ANDREW
Owner ROHM & HAAS CO